KR101673848B1 - High illumination reflector and led light apparatus with the same - Google Patents

Abstract

According to the present invention, a reflector includes: a base layer formed of metal or thermoset, and keeping a shape; a reflecting layer installed in the upper part of the base layer, and formed of amorphous resin including a plurality of micro-pores; and a color rendering layer installed in the upper part of the reflecting layer, and containing a plurality of color-rendering bodies in transparent resin. According to the present invention, the LED lighting device is capable of reducing the fatigue of eyes and improving the efficiency of reflection by reflecting light, generated from an LED chip, at high reflexibility through a reflector while converting the light into light with high color rendition through the color rendering layer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high reflectance reflector,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflector with high reflectance and an LED lighting device including the reflector. More particularly, the present invention relates to a reflector having a high reflectance including a micro foamed layer and an LED lighting device including the reflector.

Conventionally, various light sources such as fluorescent lamps, neon lights, and halogens have been prevailing in the floodlight, landscape lighting, and advertisement lighting market. However, LEDs are becoming popular as light sources in recent years. The reason why the LED is spotlighted as a light source is due to the device characteristics of the LED.

Conventional light sources emit light using mercury or the like, but the LEDs are environmentally friendly because they do not use mercury, and the power consumption is reduced, thus the maintenance cost is saved. In addition, LEDs have a longer lifetime than conventional light sources, have excellent durability and are robust.

In addition, LEDs are becoming increasingly popular because they have improved luminosity and luminous efficiency, are driven by lower voltages and have no risk of electric shock. Especially, the applications of buildings and landscape lighting are increasing due to the application of LED and the colorful presentation effect.

In view of this, recently, an illumination device using LED as a light source has been proposed, and as a result of the development of technology, a light emitting diode which emits light with a low power consumption and a high luminance has been developed and its use is gradually spreading.

Particularly, the LED illumination device for a landscape illumination is provided outside the building or outside of the building, and functions as a lighting device while aesthetically beautifuling the landscape atmosphere.

However, there are many kinds of reflection shade of LED lighting device in terms of material, shape, and structure. Since aluminum is the most common material and aluminum reflectance is only 60 ~ 70% due to the nature of material, However, the shape of the reflector interior (reflection surface) changes from a smooth shape (from a private shape) to a polygonal shape (a honeycomb shape), so that a slight illumination improvement and a light diffusion effect are achieved.

Conventionally, chromium or silver is plated in the reflector to improve reflectance. However, there is a problem in that the reflectance is lowered due to discoloration or corrosion when a certain period of time has elapsed, and as a result, the illuminance is lowered.

Accordingly, it is necessary to improve the light efficiency including the illuminance of the LED lighting apparatus by using a reflector with a high reflectance that maximizes the reflectance inside the reflector.

Korean Patent Registration No. 10-0553130

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a reflector having a high reflectance.

It is another object of the present invention to provide an LED lighting device including a reflector with a high reflectance that maximizes the reflectance.

The above object is achieved by a method of manufacturing a semiconductor device, comprising: a base layer made of a metal or a thermosetting resin and maintaining its shape; A reflective layer provided on the base layer and made of an amorphous resin containing a plurality of microvoids; And a color rendering layer provided on the reflective layer and containing a plurality of coloring materials in a transparent resin.

In the reflector according to an embodiment of the present invention, the microvoids of the reflective layer have a diameter of 0.1 to 50 탆.

In the reflector according to an embodiment of the present invention, the microvoids of the reflective layer are provided at a void density of 109 to 1,015 / cm3.

In the reflector according to an embodiment of the present invention, the color rendering material is composed of a matrix having a circular cross-section or an elliptical cross section and a coating layer coated on the matrix surface, and is dispersed in the color rendering layer in an amount of 0.1 to 15% .

In the reflector according to an embodiment of the present invention, the matrix has a particle size of 100 to 200 μm and is formed of any one of aluminum oxide, mica, silicon oxide and silicon nitride.

In the reflector according to an embodiment of the present invention, the coating layer has a refractive index higher than that of the matrix.

In the reflector according to an embodiment of the present invention, the coating layer is formed of titanium dioxide (TiO ₂ ).

Meanwhile, a streetlight head having a plurality of heat sinks on its upper surface, an arm coupling part on one side of the side, and a groove on the inside of the lower side; At least one LED chip mounted on the printed circuit board, a silicon optical bench (SiOB) mounted on one surface of the PCB, at least one LED chip mounted via the SiOB, An LED module including a lens provided in the SiOB; A base layer formed of a metal or a thermosetting resin and retaining a shape; a reflective layer provided on the base layer and made of an amorphous resin containing a plurality of microvoids; and a reflective layer provided on the reflective layer and containing a plurality of color- A reflector including a color rendering layer; A gasket mounted on the groove with one side thereof engaged with a rim of the reflector; A transparent plate which is fitted to the other surface of the gasket and is mounted on the groove portion; And a fixed cover which is fixed to an edge of the streetlight head portion in contact with the rim of the transparent plate. The above object is also achieved by the LED lighting apparatus.

In the LED lighting apparatus according to an embodiment of the present invention, the microvoids of the reflective layer have a diameter of 0.1 to 50 탆.

In the LED lighting device according to an embodiment of the present invention, the microvoids of the reflective layer are provided at a void density of 109 to 1,015 / cm3.

In the LED lighting apparatus according to an embodiment of the present invention, the color rendering material is composed of a matrix having a circular cross section or an elliptical cross section and a coating layer coated on the matrix surface, and the color rendering layer is dispersed in an amount of 0.1 to 15% .

In the LED lighting device according to an embodiment of the present invention, the matrix has a particle size of 100 to 200 탆 and is formed of any one of aluminum oxide, mica, silicon oxide and silicon nitride.

In the LED lighting apparatus according to another embodiment of the present invention, the coating layer has a refractive index higher than that of the matrix.

In the LED lighting apparatus according to an embodiment of the present invention, the coating layer is formed of titanium dioxide (TiO ₂ ).

According to the high reflectivity reflector of the present invention and the LED illumination device including the reflector, the light generated from the LED chip is reflected at high reflectance using the reflector and converted into light having high color rendering property through the color rendering layer, And the reflection efficiency can be improved.

1 is an exploded perspective view of an LED lighting apparatus according to an embodiment of the present invention,
2 is a perspective view of an LED lighting apparatus according to an embodiment of the present invention,
Fig. 3 is a cross-sectional view of the reflector cut along the line BB in Fig. 1,
FIG. 4 is an exemplary view for explaining the principle of reflection in the reflective layer of FIG. 3,
FIG. 5 is an exemplary view for explaining the color rendering principle in the color rendering layer of FIG. 3,
FIG. 6 is a graph illustrating the reflectance of a reflector of a LED lighting apparatus and a reflector of a conventional aluminum material according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements have the same numerical numbers as much as possible even if they are displayed on different drawings. Also, the terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, a high reflectivity reflector according to the present invention and an LED lighting device including the same will be described in detail with reference to the accompanying drawings.

2 is a perspective view of an LED lighting apparatus according to an embodiment of the present invention. FIG. 3 is a sectional view of the reflector cut along the line BB in FIG. 1, and FIG. to be. Here, the LED lighting apparatus 100 according to the embodiment of the present invention will be described by taking a street lamp as an example, but it is not limited thereto and can be applied to a variety of lighting such as a lighting fixture for a landscape illumination, a floor lamp, a tunnel, and a floodlight.

1, the LED lighting apparatus 100 according to the embodiment of the present invention includes a streetlight head 110, an LED module 120, a reflector 130, a gasket 140, a transparent plate 150, And includes a fixed cover 160.

Specifically, the streetlight head 110 includes a plurality of heat sinks 111 on its upper surface, an arm coupling part 112 on one side of the side, and a groove on the inner side of the lower surface to form the LED module 120, The reflector 130, the gasket 140, the transparent plate 150, and the fixed cover 160 can be mounted.

The arm coupling portion 112 is a tubular member having a hollow cross section with an open end and is connected to an arm portion (not shown) rotatably connected to the streetlight head portion 110 and provided on the column of the streetlight through an opening portion Can be combined.

The LED module 120 includes a printed circuit board 121, a plurality of SiOBs 122 mounted on one side of the printed circuit board 121, at least one SiOB 122 mounted via each SiOB 122, And a lens 124 provided on the SiOB 122 to cover the LED chip 123 and the LED chip 123. The printed circuit board 121 of the LED module 120 may be formed in various shapes so as to be engaged with the shape of the groove portion provided inside the lower surface of the streetlight head portion 110.

The SiOB 122 is an insulator having therein a wire for electrically connecting the LED chip 123 and the printed circuit board 121. The SiOB 122 has a predetermined thickness and is provided on the printed circuit board 121 in a large number.

The reflector 130 is a member in contact with the LED module 120 and has a perforation A to be engaged with the SiOB 122. The reflector 130 includes a base layer 131, a reflection layer 132, and a color rendering layer 133). ≪ / RTI >

Specifically, the base layer 131 is a layer made of a metal or a thermosetting resin, and can optionally be provided as a layer for supporting and holding the shape of the reflection sheath 130.

The reflection layer 132 is a micro foamed layer made of an amorphous resin and includes a plurality of microvoids 132-2 having a diameter of, for example, 0.1 to 50 탆. The microvoid 132-2 has a void density of, for example, Lt; 10 > / cm < 3 >. Here, the amorphous resin may include, for example, a polyphenylene ether resin, a polycarbonate resin, a polystyrene resin and an ABS (acrylonitrile butadiene styrene) resin. Of course, the present invention is not limited thereto.

4, the reflection layer 132 is formed by mirror reflection generated on the surface of the reflection layer 132 and diffusion reflection formed on the internal microvoid 132-2, Can be reflected.

The color rendering layer 133 may be a layer containing a large number of coloring materials 133-1 in a transparent resin and the coloring material 133-1 may be dispersed in the coloring layer 133 in an amount of 0.1 to 15% . Here, if the color-developing compound 133-1 is contained in an amount of more than 15% by weight based on the color rendering layer 133, there is a problem that the production cost increases and the refraction reflection efficiency does not rise.

The color rendering material 133-1 may be a coating layer 133-12 coated with the matrix 133-11 and the matrix 133-11 as shown in FIG.

Here, the matrix 133-11 is made of any one of aluminum oxide, mica, silicon oxide, and silicon nitride, for example, and has a circular or elliptical cross section having a particle size of 100 to 200 탆 .

Coating layer (133-12) is made of, for example, titanium dioxide (TiO ₂₎ as a material having a higher refractive index than the refractive index of the matrix (133-11). At this time, the coating layer 133-12 made of titanium dioxide (TiO ₂ ) can be formed by a known coating method such as a sol-gel method, a hydrothermal precipitation method, or a layer by layer (LBL) .

As shown in Fig. 5, the color-formed body 133-1 made of the coating layer 133-12 and the matrix 133-11 internally reflects light passing through the inside, and in particular, has a refractive index difference And can be reflected by light of various wavelengths by a scattering and interference phenomenon (Light Interference Effect). The color rendering layer 133 containing such a coloring material 133-1 can be reflected by light having improved color rendering properties due to interference and reflection of light.

The transparent plate 150 is a plate member that transmits light and performs protection against external factors. Considering such durability and transparency, the transparent plate 150 may be made of, for example, polyethylene terephthalate (PET), polycarbonate (PC), polymethylmethacrylate (PMMA), polyethylene naphthalate (PEN) (PES), a cyclic olefin polymer (COC), a TAC (triacetylcellulose) film, a polyvinyl alcohol (PVA) film, a polyimide (PI) film, a polystyrene (PS), a biaxially oriented polystyrene oriented PS, BOPS), glass or tempered glass. In particular, polyethylene terephthalate (PET) may be used for transparency, strength and warpage of the transparent plate 110, and polycarbonate may be used when heat resistance and chemical resistance are required. Of course, the present invention is not limited thereto.

The LED illumination device 100 according to the present invention configured as described above reflects light generated from the LED chip 123 at a high reflectance using the reflector 130 and converts it into light having a high color rendering property, And the reflection efficiency can be improved.

Hereinafter, the illumination performance is tested using a comparative example in which the structure and the structure of the LED illumination device 100 according to the embodiment of the present invention are applied.

Example

The embodiment is a reflection shade 130 constituting the LED illumination device 100 shown in Fig. 1, which is composed of a matrix 133-11 made of mica and having a particle size of 100 mu m and having an oval cross section, A color rendering layer 133 composed of a coating layer 133-12 made of titanium (TiO ₂ ) dispersed in an amount of 15% by weight and a micropores 132-2 The reflectance is measured for the reflector 130 composed only of the reflective layer 132 made of polycarbonate resin containing a large number of the reflector.

Comparative Example

In the comparative example, instead of the reflection shade 130 constituting the LED illumination device 100 shown in Fig. 1, the reflectance is measured on a reflection shade made of a conventional aluminum-made plate.

As a result of measuring the spectral reflectance of visible light of 380 to 780 nm on the reflector of each of the example and the comparative example, the reflector according to the embodiment has a maximum reflectance of 95.9% as shown in the graph of "I" , And the reflector according to the comparative example has a maximum reflectance of 75.4% as in the graph of "II ".

As a result, it can be seen that the reflector according to the embodiment has a high reflectance, and the light generated from the? LED chip 123 of the LED module 120 is reflected at a high reflectance through the reflector of this embodiment, It can be converted into light having a color rendering property.

Accordingly, the LED lighting apparatus 100 according to the embodiment of the present invention reflects light generated from the LED chip 123 at high reflectance using the reflector 130, and at the same time, reflects light having high color rendering property through the color rendering layer 133 It is possible to reduce the fatigue of the eyes and improve the reflection efficiency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

100: LED lighting device 110: head part
111: heat sink 112: arm coupling portion
120: LED module 121: printed circuit board
122: SiOB 123: LED chip
124: lens 130: reflector
131: base layer 132: reflective layer
132-2: microvoid 133: color rendering layer
133-1: Color rendering material 133-11: Matrix
133-12: Coating layer 140: Gasket
150: transparent plate 160: fixed cover

Claims (14)

A base layer made of a metal or a thermosetting resin and maintaining its shape;
A reflective layer provided on the base layer and made of an amorphous resin containing a plurality of microvoids; And
And a color rendering layer provided on the reflective layer and containing a plurality of coloring materials in a transparent resin,
Wherein the color rendering material comprises a matrix having a circular cross-section or an elliptical cross-section and a coating layer coated on the matrix surface, and is dispersed in the color rendering layer in an amount of 0.1 to 15%
Wherein the coating layer has a refractive index higher than that of the matrix.
The method according to claim 1,
Wherein the microvoids of the reflective layer have a diameter of 0.1 to 50 占 퐉. The method according to claim 1,
Wherein the reflective layer has a pore density of 109 to 1,015 pores / cm < 3 >. delete The method according to claim 1,
Wherein the matrix has a particle size of 100 to 200 占 퐉 and is formed of any one of aluminum oxide, mica, silicon oxide and silicon nitride.
delete The method according to claim 1,
The coating layer is formed in the reflector, characterized in that titanium dioxide (TiO _2). A street light head unit having a plurality of heat sinks on an upper surface thereof, an arm coupling portion on one side of the side surface thereof, and a groove portion formed on an inner side of the lower surface thereof;
At least one LED chip mounted on the printed circuit board through a SiOB, a SiOB (Silicon Optical Bench) mounted on a surface of the printed circuit board, An LED module including a lens provided in the SiOB;
A base layer formed of a metal or a thermosetting resin and retaining a shape; a reflective layer provided on the base layer and made of an amorphous resin containing a plurality of microvoids; and a reflective layer provided on the reflective layer and containing a plurality of color- A reflector including a color rendering layer;
A gasket mounted on the groove with one side thereof engaged with a rim of the reflector;
A transparent plate which is fitted to the other surface of the gasket and is mounted on the groove portion; And
And a stationary cover fixed to an edge of the streetlight head portion in contact with a rim of the transparent plate,
Wherein the color rendering material comprises a matrix having a circular cross-section or an elliptical cross-section and a coating layer coated on the matrix surface, and is dispersed in the color rendering layer in an amount of 0.1 to 15%
Wherein the coating layer has a refractive index higher than that of the matrix LED lighting device.
9. The method of claim 8,
And the microvoids of the reflective layer have a diameter of 0.1 to 50 탆. 9. The method of claim 8,
Wherein the microvoids of the reflective layer are provided at a void density of 109 to 1,015 / cm3. delete 9. The method of claim 8,
Wherein the matrix has a particle size of 100 to 200 탆 and is formed of any one of aluminum oxide, mica, silicon oxide and silicon nitride.
delete 9. The method of claim 8,
The coating layer is an LED lighting device, characterized in that formed in the titanium dioxide (TiO _2).

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